Question

Findthevalueofthepolynomial5x–4x2 +3atx=2andx=–1

Answer 1

Step-by-step explanation:

Given:-

The polynomial 5x-4x²+3

To find:-

Find the value of the polynomial at x= 2 and x= -1

Solution:-

Given polynomial=5x-4x²+3

On writing it in the standard form= -4x²+5x+3

Let P(x)= -4x²+5x+3

1)Put x = 2 then

P(2)= -4(2)²+5(2)+3

=>P(2)=-4(4)+10+3

=>P(2)= -16+13

P(2)= -3

2)Put x= -1 then

P(-1)= -4(-1)²+5(-1)+3

=>P(-1)=-4(1)-5+3

=>P(-1)=-4-5+3

=>P(-1)= -9+3

P(-1)= -6

Answer:-

The value of P(x) at x= 2 is -3

The value of P(x) at x= -1 is -6